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RE: Flat Earth and Description in the Qur'an | Bumi Datar dan Keterangan dalam Alquran
An airplane does not have to correct it's flight path 50,000 meters down because gravity exists. If gravity didn't exist, the plane would simply fly in to space. Because gravity DOES exist, a plane needs to reach a breakout speed of like mach 30 to break free from earth's gravity.